package com.wang.gulimall.search.thread;

import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.*;

/**
 * @Auther: wangliuyang
 * @Date: 2021/4/30 12:44
 * @Description: 多线程异步模式，异步编排
 */
@Slf4j
public class ThreadTest {


    public static ExecutorService executor = Executors.newFixedThreadPool(10);

    public static void main(String[] args) throws ExecutionException, InterruptedException {

//        //runAsync没有返回值
//        CompletableFuture.runAsync(() -> {
//            System.out.println(Thread.currentThread().getName());
//        }, executor);

//
//        //supplyAsync有返回值
//        CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
//            System.out.println(Thread.currentThread().getName());
//            int temp = 1 / 0;
//            return temp;
//        }, executor).handle((res, error) -> {
//            return 1;
//        });


//        //supplyAsync有返回值
//       CompletableFuture.supplyAsync(() -> {
//            log.info(Thread.currentThread().getName());
//            int temp = 1 / 0;
//            return temp;
//        }, executor).thenAcceptAsync(res -> {
//            log.info("任务2执行成功");
//        },executor);

//        Integer integer = future.get();
//        System.out.println(integer);


        //两个任务都要完成
        CompletableFuture<Integer> future1 = CompletableFuture.supplyAsync(() -> {
            log.info("任务1开始");
            int temp = 76 / 2;
            log.info("任务1结束");
            return temp;
        }, executor);

        CompletableFuture<Integer> future2 = CompletableFuture.supplyAsync(() -> {
            log.info("任务2开始");
            int temp = 22 / 2;
            log.info("任务2结束");
            return temp;
        }, executor);

//        future1.runAfterBothAsync(future1,()->{
//            log.info("任务3开始");
//        },executor);

        future1.thenAcceptBothAsync(future2,(f1,f2)->{
            log.info("f1: "+f1);
            log.info("f2: "+f2);
        },executor);


//        log.info("main......start.....");
//        Thread thread = new Thread01();
//        thread.start();
//        log.info("main......end.....");
//
//
//         Runable01 runable01 = new Runable01();
//         new Thread(runable01).start();
//
//         FutureTask<Integer> futureTask = new FutureTask<>(new Callable01());
//         new Thread(futureTask).start();
//         System.out.println(futureTask.get());

        // service.execute(new Runable01());
        // Future<Integer> submit = service.submit(new Callable01());
        // submit.get();

        //System.out.println("main......start.....");
        // CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {
        //     System.out.println("当前线程：" + Thread.currentThread().getId());
        //     int i = 10 / 2;
        //     System.out.println("运行结果：" + i);
        // }, executor);

        /**
         * 方法完成后的处理
         */
        // CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
        //     System.out.println("当前线程：" + Thread.currentThread().getId());
        //     int i = 10 / 0;
        //     System.out.println("运行结果：" + i);
        //     return i;
        // }, executor).whenComplete((res,exception) -> {
        //     //虽然能得到异常信息，但是没法修改返回数据
        //     System.out.println("异步任务成功完成了...结果是：" + res + "异常是：" + exception);
        // }).exceptionally(throwable -> {
        //     //可以感知异常，同时返回默认值
        //     return 10;
        // });

        /**
         * 方法执行完后端处理
         */
        // CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> {
        //     System.out.println("当前线程：" + Thread.currentThread().getId());
        //     int i = 10 / 2;
        //     System.out.println("运行结果：" + i);
        //     return i;
        // }, executor).handle((result,thr) -> {
        //     if (result != null) {
        //         return result * 2;
        //     }
        //     if (thr != null) {
        //         System.out.println("异步任务成功完成了...结果是：" + result + "异常是：" + thr);
        //         return 0;
        //     }
        //     return 0;
        // });


        /**
         * 线程串行化
         * 1、thenRunL：不能获取上一步的执行结果
         * 2、thenAcceptAsync：能接受上一步结果，但是无返回值
         * 3、thenApplyAsync：能接受上一步结果，有返回值
         *
         */
//        CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
//            System.out.println("当前线程：" + Thread.currentThread().getId());
//            int i = 10 / 2;
//            System.out.println("运行结果：" + i);
//            return i;
//        }, executor).thenApplyAsync(res -> {
//            System.out.println("任务2启动了..." + res);
//            return "Hello" + res;
//        }, executor);
//        System.out.println("main......end....." + future.get());

    }

    private static void threadPool() {

        ExecutorService threadPool = new ThreadPoolExecutor(
                200,
                10,
                10L,
                TimeUnit.SECONDS,
                new LinkedBlockingDeque<Runnable>(10000),
                Executors.defaultThreadFactory(),
                new ThreadPoolExecutor.AbortPolicy()
        );

        //定时任务的线程池
        ExecutorService service = Executors.newScheduledThreadPool(2);
    }


    public static class Thread01 extends Thread {
        @Override
        public void run() {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
        }
    }


    public static class Runable01 implements Runnable {
        @Override
        public void run() {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
        }
    }


    public static class Callable01 implements Callable<Integer> {
        @Override
        public Integer call() throws Exception {
            System.out.println("当前线程：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：" + i);
            return i;
        }
    }

}

